Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 231 [Rate centres in NPA 231] [Dial plan for NPA 231]

NXX: 456

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
231-456 A Glen Lake MI WYNGMIKAGT2  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348   2024-10-20   
231-456 0 Glen Lake MI GDRPMIBL36Z  624H ONVOY SPECTRUM, LLC 348   2024-10-28   
231-456 9 Glen Lake MI WYNGMIKAGT2  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348   2024-10-20   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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